/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Selections/QuadGridPatch.h
Construct a new QuadGridPatch that is a subset of the current QuadGridPatch The values (Start|End)Quad(Row|Col) define the sub-patch, the values are inclusive, so passing (1,2,1,2) defines a 2x2 quad patch
void GetSubPatchByQuadRange ( int StartQuadRow, int EndQuadRow, int StartQuadCol, int EndQuadCol, [FQuadGridPatch](API\Plugins\DynamicMesh\Selections\FQuadGridPatch) & PatchOut ) const